• April 14. 2025

The SPNS (Step Seal with PTFE and O-Ring Energizer) is a static hydraulic rod seal installed in gland housings to prevent fluid leakage during rod reciprocation. Its design includes: PTFE Slip Ring: Provides ultra-low friction, chemical resistance, and thermal stability. Elastomeric Expansion Ring (O-Ring): Compensates for PTFE’s rigidity by supplying elasticity and initial sealing force. Bronze-F...

• August 14. 2025

Hydraulic rod applications face relentless challenges: high-pressure spikes, side loads, abrasive contaminants, and temperature extremes. Traditional elastomeric seals often crack, extrude, or leak under these conditions—causing downtime and fluid loss. SPNS type hydraulic seals, are also call rod buffer step seals, static seals installed in glands or housings to prevent the leakage of fluid from ...